Science section in RRB NTPC includes conceptual and application based questions from Physics, Chemistry, and Biology. Questions are asked from electricity, human body, chemical reactions, motion, force, nutrition, and environment. Practice these 40 difficult level MCQs based on RRB exam pattern.
- Which law states that pressure of a gas is inversely proportional to its volume at constant temperature.
A. Boyle law
B. Charles law
C. Avogadro law
D. Dalton law
Ans A - Which part of brain controls involuntary actions like breathing and heartbeat.
A. Cerebrum
B. Cerebellum
C. Medulla oblongata
D. Hypothalamus
Ans C - The SI unit of electric charge is
A. Volt
B. Coulomb
C. Ampere
D. Watt
Ans B - Which vitamin helps in blood clotting.
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin K
Ans D - The chemical formula of baking soda is
A. NaOH
B. NaCl
C. NaHCO3
D. Na2CO3
Ans C - Which gas is released during photosynthesis.
A. Carbon dioxide
B. Nitrogen
C. Oxygen
D. Hydrogen
Ans C - The unit of power is
A. Joule
B. Newton
C. Watt
D. Pascal
Ans C - Which part of eye controls amount of light entering.
A. Cornea
B. Iris
C. Retina
D. Lens
Ans B - A body continues in its state of rest or motion unless acted upon by external force. This is
A. Newton first law
B. Newton second law
C. Newton third law
D. Law of gravitation
Ans A - Which metal is liquid at room temperature.
A. Iron
B. Mercury
C. Copper
D. Aluminium
Ans B - The process of conversion of sugar into alcohol is
A. Distillation
B. Fermentation
C. Crystallization
D. Filtration
Ans B - Which hormone regulates blood sugar level.
A. Thyroxine
B. Insulin
C. Adrenaline
D. Estrogen
Ans B - Which force keeps planets in orbit around sun.
A. Friction
B. Magnetic
C. Gravitational
D. Nuclear
Ans C - The pH value of pure water is
A. 5
B. 6
C. 7
D. 8
Ans C - Which organ produces bile juice.
A. Kidney
B. Liver
C. Stomach
D. Pancreas
Ans B - The speed of light in vacuum is
A. 3 × 10^6 m per sec
B. 3 × 10^7 m per sec
C. 3 × 10^8 m per sec
D. 3 × 10^9 m per sec
Ans C - Which gas is used in fire extinguishers.
A. Oxygen
B. Carbon dioxide
C. Hydrogen
D. Nitrogen
Ans B - Which vitamin is obtained from sunlight.
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Ans D - Which type of energy is stored in food.
A. Mechanical
B. Electrical
C. Chemical
D. Heat
Ans C - The hardest natural substance is
A. Gold
B. Iron
C. Diamond
D. Silver
Ans C - Which blood cells fight infection.
A. RBC
B. WBC
C. Platelets
D. Plasma
Ans B - Which gas is responsible for global warming.
A. Oxygen
B. Carbon dioxide
C. Hydrogen
D. Helium
Ans B - The unit of force is
A. Joule
B. Newton
C. Watt
D. Volt
Ans B - Which acid is present in lemon.
A. Acetic
B. Sulphuric
C. Citric
D. Nitric
Ans C - Which part of plant prepares food.
A. Root
B. Stem
C. Leaf
D. Flower
Ans C - Which organ purifies blood in human body.
A. Liver
B. Heart
C. Kidney
D. Lungs
Ans C - Which metal is best conductor of electricity.
A. Gold
B. Silver
C. Copper
D. Iron
Ans B - Which vitamin deficiency causes night blindness.
A. Vitamin A
B. Vitamin B
C. Vitamin C
D. Vitamin D
Ans A - Which gas is used for respiration.
A. Oxygen
B. Nitrogen
C. Hydrogen
D. Carbon dioxide
Ans A - The boiling point of water is
A. 90 degree C
B. 100 degree C
C. 110 degree C
D. 120 degree C
Ans B - Which gland is known as master gland.
A. Thyroid
B. Pituitary
C. Adrenal
D. Pancreas
Ans B - Which part of ear helps in balance.
A. Cochlea
B. Eustachian tube
C. Semicircular canal
D. Auditory nerve
Ans C - Which element is needed for formation of hemoglobin.
A. Iron
B. Calcium
C. Sodium
D. Potassium
Ans A - The SI unit of work is
A. Newton
B. Joule
C. Watt
D. Pascal
Ans B - Which planet is nearest to sun.
A. Venus
B. Earth
C. Mercury
D. Mars
Ans C - Which gas is used in electric bulbs.
A. Oxygen
B. Argon
C. Hydrogen
D. Nitrogen
Ans B - Which disease is caused by deficiency of iodine.
A. Rickets
B. Scurvy
C. Goitre
D. Night blindness
Ans C - Which instrument measures atmospheric pressure.
A. Thermometer
B. Barometer
C. Hygrometer
D. Altimeter
Ans B - Which part of cell controls all activities.
A. Cytoplasm
B. Nucleus
C. Cell wall
D. Mitochondria
Ans B - Which organ helps in exchange of gases in human body.
A. Liver
B. Kidney
C. Lungs
D. Heart
Ans C
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